Re: Using the break-alignable-interface (aligning RehearselMark)

[Trevor Daniels]

Werner wrote Sunday, March 21, 2010 3:13 PM


> Trevor Daniels <t.daniels <at> treda.co.uk> writes:
>
> > > Great, thank you! Why didn't I find that in the docs?
> >
> > I don't know; perhaps you could tell us ;)
> >
> > It's in the Notation Ref, section 5.5.1, which is all
> > about aligning objects, helpfully called "Aligning
> > objects".  However, the index entries may not be as
> > helpful as they could be.  Did you look in the index?
> > If so, what did you search for (and not find)?
>
> In the mentioned 5.5.1 I found
> „Using the break-alignable-interface“
> with examples for the RehearsalMark.
>
> The example, Robin gave, I only find hidden in 1.8.1 (selected 
> snippets) while
> it is missing in 1.5.2 and in 5.5.1.
> e.g.
> \override Score.RehearsalMark #'self-alignment-X = #LEFT

Well, you have to extrapolate a little.  It is quite impossible to 
give
examples of every combination of every property with every grob
in the docs.  In 5.5.1, under Self-aligning objects horizontally, it
explains what the self-alignment-X property does, and says it 
applies
to objects which support the self-alignment-interface.  If you then 
look
up RehearsalMark in the Internals Reference you will see (at the
bottom of the page) that it does indeed support the 
self-alignment-interface,
so its self-alignment-X property can be overridden.

This is the general way to work out how to override properties.

What I wondered was, given your problem, if we could add index 
entries
that would guide you to the self-alignment-X property.  How you then
override this is general knowledge covered in the Learning Manual.

Trevor